实验拓扑
实验目的：
理解BGP协议的应用场景
理解IBGP与EBGP邻居的概念
配置IBGP与EBGP邻居关系
实验内容:
R1与R2属于同一个运营商网络，AS编号为100，R1与R2之间的邻居关系为IBGP邻居关系。R3属于另一个运营商网络，AS编号为200，R3与R2之间的邻居关系为EBGP邻居关系。本实验中，路由器将分别采用物理接口和Loopback接口来进行IBGP和EBGP邻居关系的建立。
实验配置
1、基本配置
R1:
sys
sysname R1
int loop 0
ip add 10.0.1.1 32
int g0/0/0
ip add 10.0.12.1 24
int g0/0/1
ip add 10.0.21.1 24
q
R2:
sys
sysname R2
int loop 0
ip add 10.0.2.2 32
int g0/0/0
ip add 10.0.12.2 24
int g0/0/2
ip add 10.0.21.2 24
int g0/0/1
ip add 10.0.23.2 24
int g0/0/3
ip add 10.0.32.2 24
q
R3:
sys
sysname R3
int loop 0
ip add 10.0.3.3 32
int g0/0/0
ip add 10.0.23.3 24
int g0/0/1
ip add 10.0.32.3 24
q
2、配置IBGP邻居
R1:
bgp 100
router-id 10.0.1.1
peer 10.0.12.2 as-number 100
peer 10.0.21.2 as-number 100
q
R2:
bgp 100
router-id 10.0.2.2
peer 10.0.12.1 as-number 100
peer 10.0.21.1 as-number 100
q
R2:
dis bgp peer
R1:
bgp 100
network 10.0.1.1 32
q
R2:
dis bgp routing-table
R1:
ip route-static 10.0.2.2 32 10.0.12.2
ip route-static 10.0.2.2 32 10.0.21.2
bgp 100
undo peer 10.0.12.2
undo peer 10.0.21.2
peer 10.0.2.2 as-number 100
peer 10.0.2.2 connect-interface loop 0
q
R2:
ip route-static 10.0.1.1 32 10.0.12.1
ip route-static 10.0.1.1 32 10.0.21.1
bgp 100
undo peer 10.0.12.1
undo peer 10.0.21.1
peer 10.0.1.1 as-number 100
peer 10.0.1.1 connect-interface loop 0
q
R2:
dis bgp peer
dis ip routing-table
3、配置EBGP邻居
R2:
bgp 100
peer 10.0.3.3 as-number 200
peer 10.0.3.3 connect-interface loop 0
peer 10.0.3.3 ebgp-max-hop 2
q
ip route-static 10.0.3.3 32 10.0.23.3
ip route-static 10.0.3.3 32 10.0.32.3
R3:
bgp 200
router-id 10.0.3.3
peer 10.0.2.2 as-number 100
peer 10.0.2.2 connect-interface loop 0
peer 10.0.2.2 ebgp-max-hop 2
q
ip route-static 10.0.2.2 32 10.0.23.2
ip route-static 10.0.2.2 32 10.0.32.2
